1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/* Copyright (C) 1998, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep-cancel.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#include "kernel-features.h"
.text
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
#define SELECT __select_tv64
#else
#define SELECT __select
#endif
#if defined __ASSUME_TIMEVAL64
PSEUDO(SELECT, select, 5)
ret
PSEUDO_END(SELECT)
#else
/* The problem here is that initially we made struct timeval compatible with
OSF/1, using int32. But we defined time_t with uint64, and later found
that POSIX requires tv_sec to be time_t.
So now we have to do compatibility stuff. */
/* The variable is shared between all wrappers around signal handling
functions which have RT equivalents. */
.comm __libc_missing_axp_tv64, 4
LEAF(SELECT, 64)
ldgp gp, 0(pv)
subq sp, 64, sp
#ifdef PROF
.set noat
lda AT, _mcount
jsr AT, (AT), _mcount
.set at
#endif
stq ra, 40(sp)
.mask 0x4000000, 40-64
.prologue 1
#ifdef CENABLE
SINGLE_THREAD_P (t1)
#else
ldl t0, __libc_missing_axp_tv64
#endif
/* Save timeout early, since we'll need to recover this after
the system call. */
stq a4, 48(sp)
#ifdef CENABLE
bne t1, $do_cancel
#endif
bne t0, $do32
/* Save arguments in case we do need to fall back. */
stq a0, 8(sp)
stq a1, 16(sp)
stq a2, 24(sp)
stq a3, 32(sp)
ldi v0, SYS_ify(select)
callsys
bne a3, $err64
/* Everything ok. */
addq sp, 64, sp
ret
/* If we didn't get ENOSYS, it is a real error. */
.align 3
$err64: cmpeq v0, ENOSYS, t0
beq t0, $error
stl t0, __libc_missing_axp_tv64
/* Recover the saved arguments. */
ldq a4, 48(sp)
ldq a3, 32(sp)
ldq a2, 24(sp)
ldq a1, 16(sp)
ldq a0, 8(sp)
.align 3
$do32:
/* If the timeout argument is present bounce to the smaller fmt. */
beq a4, 1f
ldq t0, 0(a4)
ldq t1, 8(a4)
stl t0, 0(sp)
stl t1, 4(sp)
mov sp, a4
1: ldi v0, SYS_ify(osf_select)
callsys
bne a3, $error
/* ... and bounce the remaining timeout back. */
ldq a4, 48(sp)
beq a4, 2f
ldl t0, 0(sp)
ldl t1, 4(sp)
stq t0, 0(a4)
stq t1, 8(a4)
2: addq sp, 64, sp
ret
#ifdef CENABLE
.align 3
$do_cancel:
/* Save arguments. */
stq a0, 8(sp)
stq a1, 16(sp)
stq a2, 24(sp)
stq a3, 32(sp)
CENABLE
mov v0, ra
ldl t0, __libc_missing_axp_tv64
bne t0, $do_cancel32
/* Recover the saved arguments. */
ldq a4, 48(sp)
ldq a3, 32(sp)
ldq a2, 24(sp)
ldq a1, 16(sp)
ldq a0, 8(sp)
ldi v0, SYS_ify(select)
callsys
mov ra, a0
bne a3, $cancel_err64
stq v0, 8(sp)
CDISABLE
ldq v0, 8(sp)
ldq ra, 40(sp)
/* Everything ok. */
addq sp, 64, sp
ret
/* If we didn't get ENOSYS, it is a real error. */
.align 3
$cancel_err64:
cmpeq v0, ENOSYS, t0
beq t0, $cancel_error
stl t0, __libc_missing_axp_tv64
/* Recover the saved arguments. */
.align 3
$do_cancel32:
ldq a4, 48(sp)
ldq a3, 32(sp)
ldq a2, 24(sp)
ldq a1, 16(sp)
ldq a0, 8(sp)
/* If the timeout argument is present bounce to the smaller fmt. */
beq a4, 1f
ldq t0, 0(a4)
ldq t1, 8(a4)
stl t0, 0(sp)
stl t1, 4(sp)
mov sp, a4
1: ldi v0, SYS_ify(osf_select)
callsys
mov ra, a0
bne a3, $cancel_error
/* ... and bounce the remaining timeout back. */
ldq a4, 48(sp)
beq a4, 2f
ldl t0, 0(sp)
ldl t1, 4(sp)
stq t0, 0(a4)
stq t1, 8(a4)
2: stq v0, 8(sp)
CDISABLE
ldq v0, 8(sp)
ldq ra, 40(sp)
addq sp, 64, sp
ret
.align 3
$cancel_error:
stq v0, 8(sp)
CDISABLE
ldq v0, 8(sp)
ldq ra, 40(sp)
#endif
.align 3
$error:
addq sp, 64, sp
SYSCALL_ERROR_HANDLER
END(SELECT)
#endif /* __ASSUME_TIMEVAL64 */
#if defined HAVE_ELF && defined PIC && defined DO_VERSIONING
default_symbol_version (__select_tv64, __select, GLIBC_2.1)
/* It seems to me to be a misfeature of the assembler that we can only
have one version-alias per symbol. So create an alias ourselves.
The 'p' is for 'public'. *Shrug* */
strong_alias (__select_tv64, __select_tv64p)
default_symbol_version (__select_tv64p, select, GLIBC_2.1)
libc_hidden_ver (__select_tv64, __select)
strong_alias (__select_tv64, __libc_select)
#else
strong_alias (__select, __libc_select)
weak_alias (__select, select)
libc_hidden_def (__select)
#endif
|
